package com.itheima.cookie;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

/*
* cookie回写
* */
@WebServlet("/demo1")
public class ServletDemo1 extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("text/html;charset=utf-8");
        //1.通过响应对象写出提示信息
        resp.getWriter().write("欢迎访问本网站，您的最后访问时间为:<br>");
        //2.创建cookie对象，用于记录最后访问时间
        Cookie cookie = new Cookie("time", System.currentTimeMillis() + "");
        //3.设置最大存活时间
        cookie.setMaxAge(3600);
        //4.将cookie对象添加到客户端
        resp.addCookie(cookie);
        //5.获取cookie
        Cookie[] arr = req.getCookies();
        for (Cookie c : arr) {
            if ("time".equals(c.getName())){
                //获取cookie中的值
                String value = c.getValue();
                SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                String s = sdf.format(new Date(Long.parseLong(value)));
                resp.getWriter().write(s);
            }
        }
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req,resp);
    }
}
